The Großer Wannsee is a bight of the Havel river near the locality of Wannsee and Nikolassee, a south-western suburb of the German capital Berlin not far from Potsdam. Between the river itself and the Wannsee lies the Breite, or Grosse Breite. To the north lies the island of Schwanenwerder and, opposite from the Greater Wannsee on the other side of the Havel, is the locality of Kladow.